Steam mining-drill



(No Model.) I

' H. H. BEACH 8v B. W. ARNOLD.

STEAM MINING- DRILL.

No. 245,433. Patented Aug. 9; 1881.

fizz/awarf/- 620% wullllllllllllnllllnul .19 1? cl m W060! c1 ilwrra STATES HENRY H. BEACH AND BERNARD WV. ARNOLD, OF LITGHFIELD, ILLINOIS.

STEAM MINING-DRILL.

SPECIFICATION forming part of Letters Patent No. 245,433, dated August 9, 1881,

Application filed May 14, 1881. (No model.)

' ers skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters or figures of reference marked thereon, which form a part of this specification.

This invention has for its object to furnish a hand mining drill to be operated by air or steam, and in which the difficulties attending the use of ordinary drills are overcome.

It consists in the construction of the toolstock and piston or hammer in separate pieces, in the peculiar form of valve with lever-arm, and in other mechanism, all of which will be hereinafter fully explained, and pointed out in the claims.

In the drawings, Figure 1 is a vertical longitudinal section of a drill made according to our invention. Fig. 2 is a cross-section of the cylinder and steam-chest. Fig. 3 is a side view of the cylinder and breast-plate. Fig. 4 is a detail view of the tool-stock, and Fig.5 shows one of the valves.

a is the cylinder, in which is placed the piston or hammer b. a is the steam or air chest formed on the side of, and having openings a through which the valve-levers project into, the cylinder. The steam or air chest is provided with the necessary inlet and exhaust ports. The exhaust-port a opens into the chamber a, in which the head of the tool-stock is placed.

The valves 0 are of peculiar form and arrangement. Each one is provided with a ball or head, c,and is suspended in a socket, a ,in the side of the steam or air chest so that it swings freely to and fro. Each has an extension or lever arm, 0 which extends through the opening a into the cylinder, so that itwill be struck by the end of the hammer b. It is provided with the curved bearings c c, which are seated on the side of the chest, and with an arm, 0 which curves over the inlet or exhaust ports and opens the latter. The valves are moved to and fro by the blow of the ham mer on the lever-arms 0 The two valves are connected together by the coupling-bar c so that they are moved simultaneously. The hammer b, when making the blow on the drill, strikes the lever-arm of the valve nearest the tool stock and opens the ports, so that the steam or air enters the cylinder and drives the hammer to the opposite end, where it strikes the lever-arm of the valve at the opposite or outer end and opens the reverse ports, and the steam or air enters and again drives the hammer against the head of the tool-stock.

The hammer bis made of any suitable material, and has a nose or projection, I), which strikes the head of the tool-stock.

The cylinder has formed on it a nipple or extension, a' on which is cut a thread, to which is connected a hollow arm or shaft, (1, having a stuffing-box, d, at its inner end, and aguidenut or head, (1 at its outer end.

6 is the hollow tool orbit stock placed in the arm cl. On its inner end there is placed a head, e, which projects a little ways into the cylinder and receives the blow from the extension I) of the hammer b. Thehead e fits snugly to the contour of and slides back and forthin thechambera Thetool-stockisthrownback, after having-been driven outward by the blow of the hammer, by a spring,f, coiled around its end and bearing against the head 0 and the end wall of the chamber a. The inner end of the tool'stock is provided with suitable openings, so that the exhaust steam or air from exhaust-port a enters and passes through to the outer end thereof. The stock, at the point where it rests in the guide-nut (Z is provided with a feather, 6 which fits into a groove in the guide-nut and limits its inward movement when thrown back by the springf.

g is the tool or drill bit. It is constructed with a shank, g, which slides into the end of the tool-stock, where it is held by a key, 9 or other suitable fastening. It is made with a longitudinal opening, 9 for the escape of steam or air from the tool-stock.

h is the curved breast-plate, which is to be placed against the breast of the operator. It is held to the end of the cylinder by a bolt, h, so that it turns freely thereon.

t is a loop formed on the side of the cylinder,

in which to put a strap for holding the device, and i are the handles by which the drill is turned part round to give effectiveness to the bit in cutting the hole into the mineral.

In the construction of this device the drill or tool stock is detached from the hammer or piston. Thisis done to relieve the operation from the shock of the hammer.

In drills where the tool-stock and hammer are connected together the return-stroke of the hammer gives a shock which is impossible for the operator to long endure. This is overcome in our device. Less power is required to throw the hammer back and less to stop it and drive it forward.

This device is intended more particularly for mining coal, and to take the place of the pick in making iii-bearings.

The exhaust at the rear end is it at the side of the chest, while at the forward or drill end the exhaust passes through the tool-stock e and bit g, and passes out laterally between the points y of the latter, and blows the dust away from the drill.

Having described our invention, what we claim, and desire to secure by Letters Patent, 1s-

1. The combination, substantially as hereinbefore set forth, of the cylinder (1, provided with an extension, a containin gcham ber 0. the chest a, the exhaust a leading directly from the chest to into the chamber a, the hollow stock 0, provided with thehead c, placed within the chamber a, and between the end of the exhaust-port a and the inner end of the cylinder, and springf, substantially as set forth.

2. The combination,with theswinging valves 0 0, pivoted in the chest a, of the horizontal bar or pitlnan 0 placed within the chest a and having its ends pivoted to the valves 0 a, substantially as set forth.

3. The combination, with the cylinder having a neck, a and chamber a, of the arm (I, provided with stufling-box d and guide-nut d tool-stock 0, provided on its inner end with a head, 6 fittin g the chamber a and held in the arm d with a limited to-and'fro movement, and the spring f, substantially as set forth.

4. In a mining-drill operated by steam or air, the valves 0 a, hinged by ball-and-socket joint to the side of the chest, and provided with lever-arms c and curved bearing 0 to cover the exhaust-port, substantially as set forth.

5. In a hand mining-drill, the combination, with the cylinder at, of the swiveled breastplate h, arranged on the outer end, the handles 11, projecting laterally from the opposite end, and the loop t', arranged at the side, substantially as set forth.

In testimony whereof we atfix our signatures in presence of two witnesses.

HENRY H. BEACH. BERNARD WELLS ARNOLD.

Witnesses:

JACOB T. MILEs, W. M. MARTIN. 

